linux-kernel - Re: [PATCH] drm/panthor: Avoid showing imported BO as exported in DebugFS output

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Message-ID: <fb1c0b87-2aba-4bfa-90f1-a7a1c2dc100c@arm.com>
Date: Wed, 17 Dec 2025 15:05:49 +0000
From: Steven Price <steven.price@....com>
To: Akash Goel <akash.goel@....com>, boris.brezillon@...labora.com,
 liviu.dudau@....com
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 maarten.lankhorst@...ux.intel.com, mripard@...nel.org, tzimmermann@...e.de,
 airlied@...il.com, daniel@...ll.ch, nd@....com
Subject: Re: [PATCH] drm/panthor: Avoid showing imported BO as exported in
 DebugFS output

On 16/12/2025 15:32, Akash Goel wrote:
> The "gems" DebugFS file shows the device-wide list of DRM GEM objects.
> It displays various information about an object, including if it is
> PRIME imported, PRIME exported.
> This commit fixes the debugfs_bo_print() function to prevent an imported
> BO from also being shown as exported in the DebugFS file output.
> Both 'import_attach' and 'dma_buf' fields will not be NULL for an
> imported BO.
> 
> Fixes: a3707f53eb3f ("drm/panthor: show device-wide list of DRM GEM objects over DebugFS")
> Signed-off-by: Akash Goel <akash.goel@....com>

Reviewed-by: Steven Price <steven.price@....com>

> ---
>  drivers/gpu/drm/panthor/panthor_gem.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/panthor/panthor_gem.c b/drivers/gpu/drm/panthor/panthor_gem.c
> index b61908fd508a..5dd92cdcf316 100644
> --- a/drivers/gpu/drm/panthor/panthor_gem.c
> +++ b/drivers/gpu/drm/panthor/panthor_gem.c
> @@ -668,7 +668,7 @@ static void panthor_gem_debugfs_bo_print(struct panthor_gem_object *bo,
>  
>  	if (bo->base.base.import_attach)
>  		gem_state_flags |= PANTHOR_DEBUGFS_GEM_STATE_FLAG_IMPORTED;
> -	if (bo->base.base.dma_buf)
> +	else if (bo->base.base.dma_buf)
>  		gem_state_flags |= PANTHOR_DEBUGFS_GEM_STATE_FLAG_EXPORTED;
>  
>  	seq_printf(m, "0x%-8x 0x%-10x", gem_state_flags, gem_usage_flags);